Add text inside a shape in Numbers on Mac
Add a new shape and begin typing, or click an existing shape to select it, then type.
If a clipping indicator appears, which signifies there’s too much text to display in the shape, click the shape and drag any white square until all the text is showing.
To align the text in the shape, select the shape, then, in the Format sidebar, click the Text tab. Click the Style button near the top of the sidebar, then click any of the buttons in the Alignment section.